Composition of the study group
| Total (%) | Men (%) | Women (%) | |
|---|---|---|---|
| Traced | 1428 (100) | 777 (100) | 651 (100) |
| Interview | 824 (58) | 459 (59) | 365 (56) |
| Interview and clinic | 717 (50) | 411 (53) | 306 (47) |
| Postal questionnaire | 286 (20) | 140 (18) | 146 (22) |
| Incorrect trace | 12 (1) | 7 (1) | 5 (1) |
| Died | 37 (3) | 25 (3) | 12 (2) |
| Moved | 44 (3) | 24 (3) | 20 (3) |
| GP refusal | 17 (1) | 9 (1) | 8 (1) |
| Subject refusal | 208 (15) | 113 (15) | 95 (15) |